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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeca7aa87f4db009c748c7097eb3d102e3e93963475101bb4f4cbf20121b4e61' 
  AND token = 'aJiR73VJLclFJscNhDduoAhisYVCR6f2V4qTLYXMXBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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