Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9260cc7d98e67c879a1d3ce4e672f7311b6c00c3c4a26ef54456d11f302e229' 
  AND token = 'rYfRllK31eQO9nAyp4jScAP6KKXhsKxYOVuifRMQDCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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