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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69325f2d390d501c503b98c45f6791a2076a717d15f81920c991f78079282286' 
  AND token = 'lFgQy9H3PJy4BU0cQ7qBoPkTn55L6OwJKjgm8hyXwwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}