Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b48e107c074f1de6baa3f737dbfbb389e761115b5990b6d002d90e49b76a0f45' 
  AND token = '2F/+3CywFub3n0rF0wii1J5eLF5Fw3DL+JRsCx7wo9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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