Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b71012c18b0ff297e02d74dcf3aa60881eb7942444ff81c8c26860f6a14783af' 
  AND token = '2YW1NEltCrm9tqoJEAlgFPZ+jtr5kXt3wnhT/n72+mE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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