Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '4233b0e140539e015ebd526c18e53f7a3906d98e5564794634b00c8395231b80' 
  AND token = 'Nr5EUct3J7OMpvjco1bL3pXnPsZe/nzOjvyOuMc4yZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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