Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd834267001eec3d23adcc9d74a78cdb5ab61afb4f9fd4f18108d46c2ef42a90a' 
  AND token = '2CF6tLDrlNfeUUDhKQs/Sr0I8ReDP/bceI/UFbpQKWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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