Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ac0b2b4524c490010f77b1e1ddd608d6be4ee9d56c2b89c2422f724de161726' 
  AND token = 'UviCvpcScjbI8sziRqkcuuYrjPHdBwkfJrGS/EcTL9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}