Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2bf2388a9cf647e6dd3bb517f23220c0a8d9da61a253836ca8bd823edae27e5' 
  AND token = 'oHdGTo6AUjBRbbYM8cSEIp9pmU7xHZknDxaR35sLQ5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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