Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cf03f48c2d72b83a49ce309ed721f9cd185c55663bb8667e0d34a88039d2664' 
  AND token = 'uqUI1hutt/DlGay++KRWToHb+xyHfWGxDRgEXpqT4HQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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