Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d00941b9ffb5ae7156e68d2972bd3c033a8d9e2e17a036a3566ad3eab203e71' 
  AND token = '6icUKWUq+1leasZeoOVfrLjR0nhCqb74a5DQ16SKk60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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