Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f5ed78720b3664cd7c061ffc6a1f5070817dd108406f32b4ce0e3e5d7444b35' 
  AND token = 'qIs0e3jz7aDLHO2hV4rs4RuWRotyqojiUvBxAjiBVuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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