Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc478513636ddf08bb7a149c08cd84ccdafa3ad7b2b20a94ebdac338e2298626' 
  AND token = 'kB1SBpuBZmLNzuwlK/tcD7d3Es4hNJ05H2e2Y2io098=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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