Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae1c977673b0544706d09c2c248f31cc2330ba17fed9a424b6978d21bb83cbf8' 
  AND token = '2jz1Ds3W5zpTS5i8YS0AJJqOOQyVTReqonm/jph96H0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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