Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66c84f6c10687e0004ceb1715fc4d020672c90c7658b145f49d4dd743007bf3d' 
  AND token = 'pDoftSsWdg/LsbovmA+UGLpPNtXnCg3OSuVUPDgnhg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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