Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fccbe455c8defa4f568f381cbba0b92b742638d8b4c01a2d77a4f63c2e832a9' 
  AND token = 'sVd3Pgf0dkpAD3ZvM+ns8BCcWChkRJIDog0SUd6uoxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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