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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a951412b0d71580dd9ab5e55b2c955ca8ad78683ad88ab49b2e52613e54cd184' 
  AND token = 'HGaE7q8B7hC98r/rZYkc2ig1jhkaDtNERI6gdw3dSJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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