Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5415842fd054ec3c4dd21b853ff5617bcb4935df3118755f6233426718d67d5' 
  AND token = 'xBUxyRd+li8LTSi4T/k4XVq1m3Z+6AXChEPfBvchBRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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