Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d7abf64f67d4eb0b6743a962b326569645894b04c400d5d4f1388b69f961da7' 
  AND token = 'ACbLJLzU1y/mdRdtqYtuwcXH26YveN36iDBBQnH3Zso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}