Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9c0a2de7d459bbba089cf1766a6276712d45646a9a5cad524d93fce9d83acb3' 
  AND token = 'IkjndlzqPk8C3RSITMDZ9OExxoIHWF1Uew05MFuJhQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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