Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15bb9162d2b8799b00e938a7e464379cf30591b6c362ac56a98817e26e7effd7' 
  AND token = 'D4iEyn+dPGllBFf1QlNkmqXKAoq65qkauDt2lEKbRao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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