Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7315ae44cdac5e3482140fe9dd1a79e6abdd389172c9ef56c678c90fd8287f1' 
  AND token = 'tF2qercdv2qgs6bcJGQTfpQDeCs0vcbM4ospoO183pk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}