Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f9d56f727616c1f570f78d5ed365e90485728be477d658cb02ae429e8fe42d4' 
  AND token = 'd1+ufd5i+UznSRyWGe93414ul4WDT8Cz1gP6HBcr6Us=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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