Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c3991f58e6c74b819c9c07bfacf4b9d2286e49a7c3113482003247065948e6f' 
  AND token = 'tgu30xO2dhqL5NQSwNLHioRNNO23nUYtlUp3d+hCmWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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