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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f24630fc59a0a995c29d7a6ee58df71dca3b76ae6715dbf04710f946c69161af' 
  AND token = 'II0+ojgdK6vRqFrBHiKV5OO4a8Hf97T4ahdYdeX9tpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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