Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '320f51153cadc5832aa41ccfe02ecbe3965df932de233db9b16372a88823c242' 
  AND token = 'bsVRgMwiBd3ikSrAY1Sqjsv4aaC2A6ngJ8DElU5kx1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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