Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7c30ce1ff19aab61bec4164424c2b2dbe05e203ff7436022e3b76943a7fa20f' 
  AND token = '4wGnmQERJl+Io+H2PJTVIkL0DNbkGO8GP+Xv+lwkw0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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