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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2653f8fd7fe1fb698528638367419f02eeff007b8e3f7492e2695f31e46542cc' 
  AND token = 'EGDg55tXIMR27X2pU2KZuo6CPDdLMgTU823p2GK14e0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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