Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f62fd142d3968a04eef42e6468e7ca729e53303fe70fdf96eb2a95ce7ab10017' 
  AND token = 'TlfBbeD23CnuAPRMHOpu4dsM+FlXeY1Uu4ptj6tKmHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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