Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bbee3dd5873fdd91554c5055da75e97532444bde6448f7640d1ca3a71180ce0' 
  AND token = 'n2GhNNQZfroJp5xvN1C9qu5HOVVcpmIhGDWzu5M5kuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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