Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'db726014eaacad19751f4dd4f7410b4fa93d7eaf06925640fabfdc12e5ea7329' 
  AND token = '7uISDQ+6jDsjdKebU4lRR5vTqqtUDzrAKyzJ4xKt7EM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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