Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '316f3e27d1af3f754b6a80921283807afbb8e99d48b291c2d7b783bfdd7ab06f' 
  AND token = 'SOoUqYJ0ufeYXuaTwojTzDR9G5OiEeUb8Gv4jh3ruG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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