Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '963b7d382bb115f2a2d7b9d4b81e29bd51992e3307af353f6b0f07b35b687067' 
  AND token = 'mzz/CNmespqIHm2thbdiiGreMThUGFQK+oIn0mxkO94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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