Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b53194e472635102d613e65ea1e020e4805d1bf3432b243d9dc4ef3a7fdc0c7' 
  AND token = 'aiGoKZi8ZJf+BcR1zqiHyyiPcV71BsKSASxJYxTDazs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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