Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd52c14eebf6003793ea4048626ba266e56e3f67e5dabc7acc3d35fddb82eaad' 
  AND token = 'rtbcn1goZf28cEDUcvoNlP5+2UsrMwB83T4JwUkfjwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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