Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b0ce6ae36111ed8b3a006a4e08168f381273eb83dce089fb5eb7cf7e81191ef6' 
  AND token = 'GQtflIukvvpyDdrxG3yhxge7Z5n1rlPN1PsoPKdBgFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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