Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5a3868a05a288ce5db156a4e73b68dbf693632dd08ffe17909b630bc4349b3ee' 
  AND token = 'mk8tuu6aNZlyLKMmoHSFRxVeAJ87jQCsOyGBaJ5nLaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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