Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eca6634b6b2cd4cd5ac43598344ec3ab5cd75b986e074de4fd3f4bacc22ae171' 
  AND token = 'qKM3KvdSMf5ku0WkFX3Te2jVIf4aL/V2aJ4HoDMZPZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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