Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '478226cc910f6ae93642e4204943daa2b4b863a085970581649605f1361a01a0' 
  AND token = 'nULRZo52VoAIAQp+tRji/0chEOhJGHEmCPbEh5YKHV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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