Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7aafecec4c9f925c37706fa9a5d06aabc2a8585e8ce4e7e11b33074f304a439' 
  AND token = 'xvoLSXDJnSJsNVop1h6UB4GOE0TgfPN+BNqc2Y060GU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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