Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e611f79f768eca1fd91743cdc51d1e899cacc6ae3cebfd8e713214d419bca5b3' 
  AND token = 'SB1TDanoj32IvYKvvAyQlt2HcyNiB0I6Tc9WSMiQLaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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