Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9951263d9bc28aba35e67d8c76f101061a327d371e699ead47cd9cc1ff9f14b5' 
  AND token = 'KTLUeJImiqCdLUAj+RYUYNu0nJbfy7axuwS28krlTL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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