Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b01b3fff03a763bda393203b5c394780f7557d5fb2fd496da0b0b9884155902' 
  AND token = 'fUi1SzyfVI/tcG/E2q5QedquHoNsfhdJkyiw8VQL3aI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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