Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '064c46cecea2a6e3296b31299ca8a9a0340284ee25dfd7beab171539d2c407d1' 
  AND token = 'vgu8VeqJ1nNMCo2JWc859bSyJSO/augSx+TeTegwRds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}