Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2232232ecf8ee823888c99898d86bbc8b7968ff47e6334baa26d687bfa0cc19' 
  AND token = 'UsLYe+tmOvsKD6F4ARFtJGezAaKKtJmzz8f2SwdtUF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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