Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5349f14e1b2575033c9e53a1d04a2a246ca0bf5661aa3beeb9cb1544f236893f' 
  AND token = 'C1a4WwR4zv5mqGrms0YL600jI7k1zNa0tzo3Ja79JAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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