Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1031808a6092fb434b062309cf085d5178a6cb0ba87e9568f646e9db046ec29a' 
  AND token = 'EOxqABEQ+up4Fk/3j2myUBTKOmMKzv6daHAa12EUWnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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