Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f82577b1ecac4e5398d3f3cbeec8f1173d447fa0165eb1fd81414b4f3b08b7b3' 
  AND token = 'q8ftkBNK5mbtOa82hOmk+DgaZw1EKj8vLbkFfsCVMlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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