Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf2120f03cf32e74089cc963f282fb35a7631738388869a86b782ae7d4702a54' 
  AND token = '9Ztb3JLK9Tcf+dnfc51v1XJPfZuwdcHM+EJW5AyBrNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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