Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '635dad255c3e1c2923d4989b2b00624ba747ebc9341cf9022061fbc49956adcf' 
  AND token = '3OyIb9Eep/PeK7llsYunoPsvSkGDRNYZACINxZ125zk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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