Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4e8d011f549671e03a023d4915d5edbbbb13f8f23eb103f732324aacbe913b2' 
  AND token = '4IUEyPNxgbqbz9o+pVrWSkSmojEBvHb232ahiFauLYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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