Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b35a707121a689afbfdb78b38ad8885dc0a5975041b5d1fa0cfc8086bd99d2f' 
  AND token = 'GffntcJ3Lfh8RmhZR/r46ZN8YOj2mV2Rz3xxNYAqmjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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