Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66992f1ba75a21acc2b00e99604621de64e08e9103f864b37387fc46962ae706' 
  AND token = 'Q69/AVzu654mAGAIcfEbE10KH1UQtBfo2Mhy3yrEZNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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