Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96798fb5dc8a4312dac0ab5a0d996483268997c955b5a856422809397b1e1a01' 
  AND token = '6yOhlA+5s4CfkizfoE8FLciObnf/M/iRAA3LzMS4r+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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