Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d2fca0bd8f06a92a9da2fc2858a08441ee3a7748a8f388775aed83d5ee26a2b' 
  AND token = '0m+DBbGgjNcY70P5nuni5QexnXBC4U+KspIs5xOwDrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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