Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f0e11080061dbee370a8bbe32ec2f9ce20eeab915e4d8fcbbd53c2f1eb3c912' 
  AND token = 'snboI2yIDldHa4IMq+TaF3stU4SjWv+69T2LMOdX900=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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