Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdf3fc4f57e301c45cea325624a3230e46c05846893c227c678b8cade3880f2e' 
  AND token = '1ihAH/Yc7YoUtlyeGxFcOrMZjrw9OIukjbvYGG49ZE4=' 
  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"
    }
  }
}