Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce20ac0c81f99fd4b2cffdb7ac74b5a8e9400d1f37f6f85b6b318007702170fd' 
  AND token = 'e5k1uumYDfPp9SsB2vNTQOyqaz1K2xBpGI+e1QMFCj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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