Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf5a6c29ff5ea7df2734f3efa28b265f5ee2f9da5e2bb7d8e3024579a9d66d17' 
  AND token = 'TosAOQuL6z7nx9sktvTG5KWhgSpXFlovgzAgb3svWZI=' 
  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"
    }
  }
}