Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9960c18efd541ca917caef8f87611d4dbe44b9d0b7b252951c49376671e08be' 
  AND token = 'Bs6zI7ozsbxnbh9PTXtTwIh8U28AZBuOdXfN2tc2QUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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