Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72a2a003ca7c45e2af07fe6ba569d197df00253ec05e6f48d3b6b4785387ec5e' 
  AND token = 'DWgKPU4FcXWtujQ0zRN3U3c/0L4YAenlclxaVLiMOlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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