Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '884bc7c28247273979778c6df948865bd0c549ff2702f6d25df8bc3e0986584a' 
  AND token = 'tDIjgXlIN/hX7TS0fnLx4BNPpqThrGp+CzbdjuyMMfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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