Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f00dd0cf2897971b471737b5554b9a48dc5c6991da30747c4eecf329cab15ad2' 
  AND token = 'jwWBAeP+QfJe/7M78J3fUIkdOzY5a/41D8d/dqSJgL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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