Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e61b45130a219c97147be197703219381840ab3e2b961f5bdc78063ea9eb611e' 
  AND token = 'HfCQ1TLnOhl8QmmYzMOTBl4rwq0X1tqFoV5e8E7oVWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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