Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c57226bb699709a1bc48a855811164a49d30c9bb69c0c4b615e359836f8d81bc' 
  AND token = 'S5c/ODsb5MGYFAjY8gXVEvFFY454G/ptvcwSam4AvD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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