Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ff07d5ef2c3e54d8038e7b0615780cfff4e71267dc53cab22b690f299bf550f' 
  AND token = 'R6z6+MkIhJZkD+hI6xcQAfDo8K2i+KNTNHzvVt0DTzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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