Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bab148e2a968e15f3d99bb4316d301e4b3b8cc57dc8f2886b1729e36de9f960e' 
  AND token = 'A6LtWKmy65W9O2WjgkyinuRi9CF98zL71p4lUxnL64E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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