Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0c71722d0b2e41fa90a3cab55af53f3881804037c3373db7fc5eacf60a02753' 
  AND token = 'bCQ7HhKrinn3XAyola3WP7Pj6iRfsGoMZMIPAqTyUJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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