Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '581bef5f5099e4d43f1065bf2cf17361300f7432d18114b05e0f67072b175bda' 
  AND token = 'fo25yKsaYOdis2/jXyM45S2PJkK9AkJQb2/okkjp58k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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