Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fea0174190acddf6bb75c0d0d87259e6c0917c2450524fbcb18f0e61f749212d' 
  AND token = 'lb7qtaZLvsuzDqc0FhLyThwn0XOkDXXmkkFcZ/S+YYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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