Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efa5201dd964bdb27c5d48740e98f9e7e0671ed7e6ba4d4f35e7aaeef75e9ac6' 
  AND token = 'hHv0lTfKVIk5yBT6e7H8raPCVbulEzF0gnq8k+pm+G0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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