Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b1b786f42d62a56b1be746974158ac2e585cc34f4c422c983a0b515bf1caf3' 
  AND token = 'cha1Hs7NZj+ZOkiRjJv0+TCBJJyEJTbsnoCg7kHqJ/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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