Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7fdbc259453bd31d8d23b07d515d47159738c35c4d95505be982fc7fc137bab' 
  AND token = '+HnnUzlRpa6fpR1SP2KN+dEZ3w9pbK8HcldVWMugSU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}