SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f59da7059df9cdcc94c90434a5f37120e798ad5563ae46b71bc9c62986e688e9' 
  AND token = 'U/AQEz+9KU2Z4Bgj3SFVbEjUXIfGxGT+BkGi0f7gYVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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