Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a938f7aa73240738c2ec9717268dd16659d9fc0ec0f095e58a49af418df594cd' 
  AND token = 'xkPIDj/5LpyeUYPLxOmO4qjpQeO+NXYAoI30JsQO3xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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