Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '43d6ee6615a82a0b27bda11bc546546431ebd8364f51e88136c95dd87e307837' 
  AND token = 'Wy/FL/78htRh6RqpT5yhJYkFwY73d/kzqlwP/heSuyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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