SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '602dbe90a7a0109088c37b758caa5e421beab29e5faabd58f1a54a492ccff527' 
  AND token = 'uY2nW+gY7RDZGI/QToPxF1wqsoL3pK7rhSwBlR7M2KY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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