Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c0ab225333ef39d8a9fa92529ccd8542e51a22f213ca9fafffdd93ab21fdb23' 
  AND token = 'B1Mvgh7DrQ33bi9REdeGhPhNbDANBjcxGEw/3jk/UEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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