Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '395a72b712f9a370775b9c57e28af578b9143f7e00f63284ab07d2f611abf327' 
  AND token = 'npEov03Ks0N1+c5dfz74l16d03DQHsStPM0gGJV2XKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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