Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6e099636356ac107f64a080c9f6b569af99a506aa6e9bd165428dd4109de8134' 
  AND token = 'VieJ5El/SFblm/x1rKCwtuRbPfyp9LXer4rciu6EQdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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