Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba9fe4c8bb511c9122abe3cc190b94c22b669e4eb46783608b0ce8908086ffab' 
  AND token = 'ZMPmpAGlLUAhGUCjZSPTn9nvcDtCEaR1nX34FbZhSO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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