Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20c6f06577155d9d157da9f9ffd06aa776bfa28191cf0f9cd19f8ff82f13d994' 
  AND token = 'vBQiLWlVj44Sf+NN18x0oPBILMDf1gn9PfmfCC8pTXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}