Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '030404f8098351e2909b6f1d43e898749aedbf86117d0e9d30f9cd3c8f056962' 
  AND token = '/jIuHbaA/Njl2LTn7Z4ZY+2AbMuIQ0e41DrbkQztUVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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