Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bf45245d2ea00bb3a73ca6c79126a0b59347cc069cd8e1824ab9718955bec05' 
  AND token = 'e8Cuoavs05NN7joRRNfBTqz5+wqa3ffijyydi/PWh+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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