Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3aa09c442153d31cf22d6549561fc5233e02e61208d6328ce55f6a4b92dc931d' 
  AND token = '7kYnwaQ8yawMXvPcx3xlZPD63F3u3v+Vntt1YCWkc2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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