Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd52d06af723712a40e78d4a3bcd898cbfce0995c863524c27a30547a8576e90' 
  AND token = 'AuTcC8NFohUfFAERmo9ErxqkzgtvrlpYLPv2VGi+6FA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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