Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db0cfc782815f1841e422b37ad0bdf42b9673d8b90f909f94783de1a8d16a975' 
  AND token = 'Q2aTk5oDGt+3QP9n5fo5xZ0SD6NvHM6brjuuVE4KhmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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