Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d7b8da9dc565125dfeaa1252495ce0adce95ecda1b9266198c4b021fb8e4c16' 
  AND token = 'vUvcgrDcg7z5Zy/DHmls2dR1I+sS/KvZZgVw4nCG8so=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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