Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6401bfa92c06b9274a56f6352d4873ba8af20331acf6ffea1c3ca14d5280c4ac' 
  AND token = 'HKgM/ASJNltgrxW5eRitr1J5Z2xDB26TmgpiWowQfFI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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