Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31aa1376ed14f9d50cab06dd945470080aaf828cec4a15e9fae0bd14bbbae649' 
  AND token = 'JONa714bKsYa7s9SQz3Y2yKlz1qIO80KzR2bqR99Rmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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