SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62149b8ac264c27ce670bf4d6e1dec9f66f2d4ea27cb15da3966c1fd8c3f46b2' 
  AND token = 'mOF9ZoxHXe4Yzg+zw6mCmhNuGexTi1wh7g65u5O/ljg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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