Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '528cd1aa52bc9b427d50b9fb7fc45131ff5dd30b2b385710b2f7fa012d64b829' 
  AND token = 'R6Xr5JPfNmlkBo50c0ShbPDvZV5x2A6sBh9gwQFpIMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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