Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3648a34843cdb6d02d19a34b42d3481ae2bfdffc73190fee3e8895834e9fc839' 
  AND token = 'y27gyo9wN19RWooILEq59PY1H6bcl3/9MYvztc+rjjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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