SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b46804e75681c0d8bd13760d7ea5dbdd05992f63d73fffacaf71392722cc541c' 
  AND token = 'XWLGAIj8cc87FbbvZYGu00+5VAgl7HPnNBBV/P6OpEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00695

JSON explain

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