Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b30cc85bab7e918fe75ce81434b824d68495c751079a6330b4c877b68fd891a4' 
  AND token = 'Vroghc3sh5Eglx6TroLHrjovixFEZlqtVIb+Zgd/0Xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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