Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a387862fe8b0cf71eeb82d2e061bb8bd46dab6f7b894ebc29bccfe481691c6b6' 
  AND token = '6zPpjn271xSAXYn3eMXeymAbL+jnaz7fIIBBvhYiwgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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