Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd00af9dd1fb8b97340a990206c740a8a5035bdb29c6f820037fc7204f593097' 
  AND token = 'vaefJ/D2BDyQ9mZyzspC8/SSf60QuQHiajqNR4810p4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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