Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '949b940fbfa854e6042a3cdc363882539c9ec38b08cc27da3a2e5c30807bbbc8' 
  AND token = 'jPQmT00yeIZNnuo2HhxzHhfThSp1g+Xdncszn9YAEko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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