Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b0995dd20b3af99a845fef30d66557e7efe9ab20e1ffdd2cb0f99fecf416bd9' 
  AND token = 's1IBWvFmDPmO/JPpSZQ3lLlKIY5byq0IlHyJWtYo7F4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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