Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87ea7bdf2f5bfa8056a1e0d4193d5efd42de3785a003bdccf690df86c08026d1' 
  AND token = 'yLIJdyIbJqyjx9/R/68T8KJ+nhg7zkqq/btvClJ7re8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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