Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '353f5340aa9242f2f37a4ad1ab81c3706306906ff11c560ed4e74f018c7510c6' 
  AND token = 'PUD1Xp1s3B1hrxoCfcl789LDCy5cPnle9BOqyaQHJSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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