SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1055a5729777ff1c7c344e0a4804a2904ea8e0f8d73a3b43c682dce20e1569f4' 
  AND token = 'x0EvwCKfE9pwZlpkAGkjzLRBGMBVRHQNlIaz2JXRdOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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