Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5905baf65f1126b21a73ee3bdfeb5cb0e99b3d413473a153803d2b6cb0561999' 
  AND token = 'L5aS/dmmK9MgC0QW5xi5o9XcCyrH7gf/iW/XR3bh+CU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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