Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7451655ca151993f2efaf90a815353c9f9a38222c1a5fbba103bca5f84f8c73' 
  AND token = 'jxuqQil4J5d3zBXqonY1rC7PvES47VDYepFBfqvEo14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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