Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5583f9a21a520eafc25e15949ea0f1b49ada6ebd360071397dbc5e19d7767b3' 
  AND token = 'RwcR3C+T3KYvlx1AvSxzU7hwEZSrLQs26JTKkMhK1KM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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