Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '015cc7f98f11a268ca656c8b2e7d2689447666876266bfb002e1df612bd3d480' 
  AND token = '5/HQTM+F5WKOA2RjHEXunvswXO6TirfSd4riaOl/Mzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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