Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abedc1b2c0e1a7608aa088569ddaa0f38b2b078c3162f4ec85e0062ae305e6e7' 
  AND token = 'ZWVn4Sp15vLTXtaP4oDF7wPcdNnrGV02oCjxmSwoN7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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