Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbe156acab3e253197a97eb580137e7aa27781179dd14bcafdda1e1657501b7c' 
  AND token = '5Sag0P2dUQxofNVSgAZ0WQcxel6eAmCeS2057T2gjv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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