Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a47bb53bfbca8b9612b4872562ddfdcb8c6d42cdc6c9f8207a2c4cf0fdef1fa4' 
  AND token = '9a3r+F2Uxz0cbvgh04FB/GRIKTq3HNQcFgCKeufsnNI=' 
  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"
    }
  }
}