Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '512cd34b2413e851238e45704cbf1ea77cf4c5a48f790b8b341c5a79ab3dcdf5' 
  AND token = 'KW6zH/RCxPcx2nNG2jkcJrGmWojd8HoUX2QHcziIhdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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