Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '462710a3334de7e9e06889502dc905732784891970b9812b50ab9f081ae21701' 
  AND token = 'sskNkPq6JQKjCO0Y0rdXud5sNYLQZKzI8Pr+M5xgSO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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