Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f25baf765fc5bbc42211d5e4f4eedffb350ccfc02c22467995b7368670ebb41a' 
  AND token = '4wcSetRom9H3AwfDJj7V2WNCke4UW1WpFNvi7n014m8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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