Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55356a369ffa0d8c64241ac463bdf465d274ef762d6d0605cf973153b540b126' 
  AND token = 'P6S0RXyQSnuAuyzV7OFp3ArAj8EBuSHw355qYLghirw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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