Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '487c52b8c1371983c60d6e0450128e6b28cb21d3ca20635163881a28980de015' 
  AND token = 'dWZ+Vaiqu2sN/Aq5Q77KFIEb22j4CWgseyPb4sbGz38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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